http://www.tf2outpost.com/trade/6571505

Heart Reggae (5.2-6.6 buds) + 1 bud

Knifestorm Guadalajara (5.5-6.4)

Smoking Executioner (3.9-4.8 buds)

Holiday Headcase (4.5 buds)

Stormy Storm Towering Pillar (3.1-4 buds)

Misty Skull Pugilist's Protector (2.9-4.2 buds)

Stormy 13th Crocleather (2.3-3.1)

Vivid Plasma Tricorn (1.3-1.7 buds)

http://www.tf2outpost.com/trade/7563921

Harvest Moon Capotain (3.5-4.9 buds)

4 buds

Smoking Wayfinder (2.6-2.9 buds) + Steaming Outdoorsman (18-23 keys) + 26 keys

Bubbling Drill Hat (26-35 keys) + Smoking Hallmark (1.7-1.9 buds) + dirty Summer Set (???) + Sweets

Stormy 13th Conquistador (???) + Steaming Trilby (25-32 keys) + 1 bud

Clean Flip-Flops (2-2.5 buds)

Bubbles Honcho (1.3-1.7)

http://www.tf2outpost.com/trade/7642905

Stormy 13th Birdcage (We have no current price, but it's likely around 4-6 buds judging by the effect tiers and the owner's trades)

Sold

http://www.tf2outpost.com/trade/7495495 (4 buds)

http://www.tf2outpost.com/trade/7526185 / http://i.imgur.com/9L7sD.png (~2.7-3.7 buds)

Conclusion: Two were sold around or below 4 buds, but there are some offers that push that limit. A lower end of 4 appeases the ones that sold and the market while a high end of 5.2 reflects the higher end offers that can be seen.

Note: The picture is thanks to the previous owner that I talked with.